ASoC: sgtl5000: Fix define for SGTL5000_BIAS_R_MASK

According to the datasheet:
CHIP_MIC_CTRL 0x002A

BITS[9:8] BIAS_RESISTOR
        0x0 = Powerd off
        0x1 = 2.0 kohm
        0x2 = 4.0 kohm
        0x3 = 8.0 kohm

Thus SGTL5000_BIAS_R_MASK should be defined as 0x0300 instead of 0x0200.

Signed-off-by: Axel Lin <axel.lin@gmail.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

sound/soc/codecs/sgtl5000.h

@@ -280,7 +280,7 @@
 /*
  * SGTL5000_CHIP_MIC_CTRL
  */
-#define SGTL5000_BIAS_R_MASK			0x0200
+#define SGTL5000_BIAS_R_MASK			0x0300
 #define SGTL5000_BIAS_R_SHIFT			8
 #define SGTL5000_BIAS_R_WIDTH			2
 #define SGTL5000_BIAS_R_off			0x0